Improvement in vise



vise, and slightly larger.

,gitudinally on eachof its sides.

@met @time NOYESQBALDWIN, or BUFFALO, NEW YORK.

Letters Patent No. 91,199, dated June 15, 1869.

Y IMPRQVEMENT IN vrsn.

The Schedule referred to in'these Letters Patent and making part of the same.

To all whom it may` concern I. I

Be itv known that I, N oms BALDWIN, of Buffalo, in the county of Erie, and State of New York, have invented a new'and improved Mode of Constructingl Bench-Vises; and I do hereby declare that the following is a full and exact description thereof, reference being had tothe accompanying drawings, in which- Figure lisa side view of the iixed part of a com- Figure 3 is a side viewof the chills, in connection with the sand core and nut. i

Figure 4 is a View of the ,inner end Voffa chill.

My invention relates to the fixed, or female part E, gs. 1 and 2, of the slide-vismand y It consists in a process, or device' by which the nut N, g. 2, of said part, is fixed therein, atthetime that part is cast, and by which, also,;the breachingprocess, which is both dillcult and dangerous to the integrity of the casting, is done away.

In the following description the forni of tlie slide, or` male part of the vise contemplated, is that of a rectangular parallelopipedongbutgshouldfthatpart be of `any other form, the modifications necessary will read'- ily recur to those skilled in 'the art. Y

I first make twochills, marked O'in `the figures. They must be ofthe same form with the slide of the They may be made of cast-iron, in two parts, these being screwed together, as shown in fig. 3,01- otherwise rmly secured, o1; each chill may be cast in one piece. They are best made hollow at their inner ends, as

shown iniig. which hollow should extend for` some distance, as -to D, g. 2.

The inner. end of each chill has a slot running lon- I These slots are marked x in the figures, and may be made with a saw of narrow cut. Y f

I now take the nut N, g. 2, which may be of the usual'form, and made in the usual way, with the thread cut in it.

Through the nut, I lslide. the straight bar B, lig.V

2, which exactly fills `its bore, letting it rest at the centre.

The ends of the bar B are now passed into the hollows' of the chills, tothe shoulders D and D, through which the small rods R Itl are passed, and screwed into the ends of the bar B, asshown at u u.'

To the ends of the rods It R, levers, or nuts a a are attached, ,by means of. which the ends of the bar B are screwed up tightly against the shoulders D D. This is done to connect the chills with the nut N, and

to hold them in proper relation; but any other device known in mechanics thatwill effect the same end may be employed.

Care must be taken that the bar B be of just such length as that, 'when in position, the distance between the eds of the chills' shall be less than thevdepth of the part E, by exactly that part which it is desired to have chilled.

The position of the holes in D D, through which the rods R It are passed, regulatethe position of the eye ofthe nut N, in the part E. f The chills and nut N being connected as above described, and held so that the corresponding sides of the chills shall lie in the',same plane with the lower part of the nut, in its propel' position, the sand core s, lig. 3, ismade upon and surrounding the nut, but leaving the lower part of the nut extending downward below the core, as far as it is desired to have it inserted in the casting E, as shown in fig. 3.

The cores is somewhat greater in thickness and depth than the chills, so that the planes of its` sides lieoutside the planes of the corresponding'sides of the chills.

The core is baked in the usual way, its relative `position, as formed, to the chills and n-ut being carefully preserved.

On being coated with moulders facing, the chills and core, as shown in iig. 3, are now ready for use.

The pattern by which the part Eis moulded has prints attached, fitted for the chills C C, iig. 3. This is, of course, done in the usual way, and when the patteruis drawn from the sand, the combined parts, shown in lig. 3, are carefully laid in position in the prints, and the casting completed in the Yusual way. f

' hen taken from the sand, the casting and chills will, of course, appear as in iig. l.

The nuts a a are now removed from the outer ends of the chills, when they are readily drawn out -from the casting E, and are again ready for use.

Let, now, the bar BA and the sand of the sand core be removed from E, and, if the conditions have been properly observed, it will be found that the nut N is securely xed in its true position, as shown in fig. 2, and that the casting E is regularly and truly fitted to receive the slide-part of the vise without breaching, which, owing to the imperfection of the casting, chills not being used, has heretofore been necessary,

and the nut N could not be inserted in the casting E previous to broaching, from the requirements of that process.

It remains only to explain the use of the slots x in the chills C.

They are for the purpose of: permitting the ends of the chills to be slightly diminished, under the I claimcontracting force of the metal in E, when cooling, 1. The manner of inserting the nut Nin the part these slots, with the elasticity of the metal in the E, as, or substantially as set forth.

chills, aordng such facility, so that-.the chills are af- 2. The chill G, as and for the purpose set forth.

terward easily removed, as before stated, and without NOYES BALDWIN. injury. Witnesses I do not, in my invention here set forth, claim any ALEXANDER DICK,

addition of parts to the vises now in use; but I LYMAN P. Pmzxms. 

